How do you find the value of $sec (-330)$ ?

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How do you find the value of $sec (-330)$ ?

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Answer 1 · 2015-10-19T15:20:26

Find $sec (-330^@)$

Ans: $(2sqrt3)/3$

Explanation:

sec (-330) = 1/(cos (-330). First, find cos (-330).
cos (-330) = cos (30 - 360) = $cos 30^@$ = sqrt3/2. (Trig Table)
Therefor, $sec (-330) = 1/(cos (30)) = 2/sqrt3 = (2sqrt3)/3$

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How do you find the value of $sec (-330)$ ?

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How do you find the value of $sec (-330)$ ?